Actually I had done this:

  wget -O ~/Downloads/books.csv 'https://link.springer.com/search/csv?facet-content-type=%22Book%22&package=mat-covid19_textbooks&fbclid=IwAR14_P6ZT4OoaHCYpxQCu_NtGLENhKOhfVD-b648OmS3TFM39gDZEhkDBS0&facet-language=%22En%22&sortOrder=newestFirst&showAll=true' && awk 'BEGIN { FS = "," }; { gsub("book","content/pdf",$9) ; if ($9 ~ /^"http/) { print "wget --content-disposition -P ~/Downloads/springer " $9; } }' < ~/Downloads/books.csv | bash

RIP Aaron Swartz

This is a nice tool and the Dockerfile is quite handy, but my guess is these books probably have a download limit per book since more used to be available.

Maybe use the script's category or individual book modes to ensure more people can get access to them?

This is pretty useful; thanks for sharing.

There's some good books I always wanted to take a look, but wasn't ready to commit; this will help me decide. Smart move by Springer.